基于ABCD矩阵的Z-扫描理论  

Z-Scan Theory Based on ABCD Formalism

作　　者：王超[1] 李渭龙[1] 唐轶凡[2] 任兆玉[1] 张崇辉[1] 白晋涛[1] 

机构地区：[1]西北大学光子学与光子技术研究所,西安710069 [2]西北大学物理系,710069

出　　处：《光子学报》2007年第3期444-447,共4页Acta Photonica Sinica

基　　金：教育部国际合作项目(教外司留[2003]317号);陕西省国际合作项目(2005kw-22)资助

摘　　要：基于光学系统对傍轴激光束的传输与变换技术—ABCD定理,以非线性相移为研究对象,采用表征高斯光束特征的q参量在光束无像散近似假设下,分析了Z-扫描测量方法的理论基础,得到了表达简单的解析理论公式.在非线性相移|ΔΦ0| <πrad时,所得模拟结果可以很好地与已知理论结果相吻合.对CS2和纳米碳管乙醇溶液的非线性测量及数据的拟合,证明了用此结论进行数据分析的简洁性和优越性.Based on the laser transmitting and transforming technology of ABCD theory,an analysis on the theoretical foundation of Z-scan has been made by employing an aberration-free approximation of a Gaussian beam and using the investigated object of nonlinear phase shifts directly,which resulted in some simple analytical expressions for Z-scan transmittance. Under the condition that ｜△Ф0｜〈πrad,the simulated result is coincident with what has been known. Also the concision and advantage of data analysis using it can be proved by the two Z-scan experiments of CS2 and CNTs ethanol solution.

关 键 词：三阶非线性极化率 ABCD定理 q参量 

分 类 号：O436.4[机械工程—光学工程] O437.5[理学—光学]